The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/amd64/amd64/mptable_pci.c

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    1 /*-
    2  * Copyright (c) 2003 John Baldwin <jhb@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. Neither the name of the author nor the names of any co-contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 
   30 /*
   31  * Host to PCI and PCI to PCI bridge drivers that use the MP Table to route
   32  * interrupts from PCI devices to I/O APICs.
   33  */
   34 
   35 #include <sys/cdefs.h>
   36 __FBSDID("$FreeBSD$");
   37 
   38 #include <sys/param.h>
   39 #include <sys/systm.h>
   40 #include <sys/bus.h>
   41 #include <sys/kernel.h>
   42 #include <sys/module.h>
   43 
   44 #include <dev/pci/pcireg.h>
   45 #include <dev/pci/pcivar.h>
   46 #include <dev/pci/pcib_private.h>
   47 #include <machine/legacyvar.h>
   48 #include <machine/mptable.h>
   49 #include <machine/pci_cfgreg.h>
   50 
   51 #include "pcib_if.h"
   52 
   53 /* Host to PCI bridge driver. */
   54 
   55 static int
   56 mptable_hostb_probe(device_t dev)
   57 {
   58 
   59         if (pci_cfgregopen() == 0)
   60                 return (ENXIO);
   61         if (mptable_pci_probe_table(pcib_get_bus(dev)) != 0)
   62                 return (ENXIO);
   63         device_set_desc(dev, "MPTable Host-PCI bridge");
   64         return (0);
   65 }
   66 
   67 static int
   68 mptable_hostb_attach(device_t dev)
   69 {
   70 
   71         device_add_child(dev, "pci", pcib_get_bus(dev));
   72         return (bus_generic_attach(dev));
   73 }
   74 
   75 /* Pass MSI requests up to the nexus. */
   76 static int
   77 mptable_hostb_alloc_msi(device_t pcib, device_t dev, int count, int maxcount,
   78     int *irqs)
   79 {
   80         device_t bus;
   81 
   82         bus = device_get_parent(pcib);
   83         return (PCIB_ALLOC_MSI(device_get_parent(bus), dev, count, maxcount,
   84             irqs));
   85 }
   86 
   87 static int
   88 mptable_hostb_alloc_msix(device_t pcib, device_t dev, int *irq)
   89 {
   90         device_t bus;
   91 
   92         bus = device_get_parent(pcib);
   93         return (PCIB_ALLOC_MSIX(device_get_parent(bus), dev, irq));
   94 }
   95 
   96 static int
   97 mptable_hostb_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr,
   98     uint32_t *data)
   99 {
  100         device_t bus;
  101 
  102         bus = device_get_parent(pcib);
  103         return (PCIB_MAP_MSI(device_get_parent(bus), dev, irq, addr, data));
  104 }
  105 
  106 static device_method_t mptable_hostb_methods[] = {
  107         /* Device interface */
  108         DEVMETHOD(device_probe,         mptable_hostb_probe),
  109         DEVMETHOD(device_attach,        mptable_hostb_attach),
  110         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  111         DEVMETHOD(device_suspend,       bus_generic_suspend),
  112         DEVMETHOD(device_resume,        bus_generic_resume),
  113 
  114         /* Bus interface */
  115         DEVMETHOD(bus_print_child,      bus_generic_print_child),
  116         DEVMETHOD(bus_read_ivar,        legacy_pcib_read_ivar),
  117         DEVMETHOD(bus_write_ivar,       legacy_pcib_write_ivar),
  118         DEVMETHOD(bus_alloc_resource,   legacy_pcib_alloc_resource),
  119         DEVMETHOD(bus_release_resource, bus_generic_release_resource),
  120         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  121         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  122         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  123         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  124 
  125         /* pcib interface */
  126         DEVMETHOD(pcib_maxslots,        legacy_pcib_maxslots),
  127         DEVMETHOD(pcib_read_config,     legacy_pcib_read_config),
  128         DEVMETHOD(pcib_write_config,    legacy_pcib_write_config),
  129         DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt),
  130         DEVMETHOD(pcib_alloc_msi,       mptable_hostb_alloc_msi),
  131         DEVMETHOD(pcib_release_msi,     pcib_release_msi),
  132         DEVMETHOD(pcib_alloc_msix,      mptable_hostb_alloc_msix),
  133         DEVMETHOD(pcib_release_msix,    pcib_release_msix),
  134         DEVMETHOD(pcib_map_msi,         mptable_hostb_map_msi),
  135 
  136         { 0, 0 }
  137 };
  138 
  139 static devclass_t hostb_devclass;
  140 
  141 DEFINE_CLASS_0(pcib, mptable_hostb_driver, mptable_hostb_methods, 1);
  142 DRIVER_MODULE(mptable_pcib, legacy, mptable_hostb_driver, hostb_devclass, 0, 0);
  143 
  144 /* PCI to PCI bridge driver. */
  145 
  146 static int
  147 mptable_pcib_probe(device_t dev)
  148 {
  149         int bus;
  150 
  151         if ((pci_get_class(dev) != PCIC_BRIDGE) ||
  152             (pci_get_subclass(dev) != PCIS_BRIDGE_PCI))
  153                 return (ENXIO);
  154         bus = pci_read_config(dev, PCIR_SECBUS_1, 1);
  155         if (bus == 0)
  156                 return (ENXIO);
  157         if (mptable_pci_probe_table(bus) != 0)
  158                 return (ENXIO);
  159         device_set_desc(dev, "MPTable PCI-PCI bridge");
  160         return (-1000);
  161 }
  162 
  163 static device_method_t mptable_pcib_pci_methods[] = {
  164         /* Device interface */
  165         DEVMETHOD(device_probe,         mptable_pcib_probe),
  166         DEVMETHOD(device_attach,        pcib_attach),
  167         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  168         DEVMETHOD(device_suspend,       bus_generic_suspend),
  169         DEVMETHOD(device_resume,        bus_generic_resume),
  170 
  171         /* Bus interface */
  172         DEVMETHOD(bus_print_child,      bus_generic_print_child),
  173         DEVMETHOD(bus_read_ivar,        pcib_read_ivar),
  174         DEVMETHOD(bus_write_ivar,       pcib_write_ivar),
  175         DEVMETHOD(bus_alloc_resource,   pcib_alloc_resource),
  176         DEVMETHOD(bus_release_resource, bus_generic_release_resource),
  177         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  178         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  179         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  180         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  181 
  182         /* pcib interface */
  183         DEVMETHOD(pcib_maxslots,        pcib_maxslots),
  184         DEVMETHOD(pcib_read_config,     pcib_read_config),
  185         DEVMETHOD(pcib_write_config,    pcib_write_config),
  186         DEVMETHOD(pcib_route_interrupt, mptable_pci_route_interrupt),
  187         DEVMETHOD(pcib_alloc_msi,       pcib_alloc_msi),
  188         DEVMETHOD(pcib_release_msi,     pcib_release_msi),
  189         DEVMETHOD(pcib_alloc_msix,      pcib_alloc_msix),
  190         DEVMETHOD(pcib_release_msix,    pcib_release_msix),
  191         DEVMETHOD(pcib_map_msi,         pcib_map_msi),
  192 
  193         {0, 0}
  194 };
  195 
  196 static devclass_t pcib_devclass;
  197 
  198 DEFINE_CLASS_0(pcib, mptable_pcib_driver, mptable_pcib_pci_methods,
  199     sizeof(struct pcib_softc));
  200 DRIVER_MODULE(mptable_pcib, pci, mptable_pcib_driver, pcib_devclass, 0, 0);

Cache object: 8673a6dd05310c51b24ec4e829375552


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